Siemens SIMATIC CP 340 User Manual page 178

Connecting Cables
B.2 20 mA TTY interface on the CP 340-20mA-TTY
20mA-TTY connecting cable (S7 (CP 340) - CP 521 SI/CP 521 BASIC/ IBM-compatible printer)
The figure below illustrates the connecting cable for a point-to-point connection between a
CP 340 and a CP 521 SI/CP 521 BASIC.
For the connecting cables you will require the following male connectors:
● At the CP 340 end: 9-pin sub D male connector with screw-locking
● At communication partner: 25-pin sub D male connector with screw-locking
178
Figure B-12 20mA TTY connecting cable CP 340-CP 521SI, CP 521BASIC
PtP coupling and configuration of CP 340
Manual, 04/2011, A5E00369892-03